There are about 21 IPOCK men who served from NC.
In addition to 4 named union IPOCK's there is one more, Benjamin Ipock, who served in the 5th Regiment Indiana Cavalry (90th Regiment of Indiana Volunteers). But I don't see a "Bryant" or "M. Bryant" among them.

The 1850 Federal Census does show:

1850 United States Federal Census
Name: Bryant Ipock
Age: 20
Estimated Birth Year: abt 1830
Birth Place: North Carolina
Gender: Male
Home in 1850(City,County,State): District 7, White, Tennessee
Household Members: Name Age
Bryant Ipock 20 [26?] b. NC Hoteler??? [wording is not clear]
Rebecca Ipock 24 b. TN
James Edwards 60 b. NC
Louisa Ipock 2 b. TN

1880 United States Federal Census
Name: Rebecca Ipock
Home in 1880: Hazelwood, Webster, Missouri
Age: 52
Estimated Birth Year: abt 1828
Birthplace: Tennessee
Relation to Head of Household: Wife
Spouse's Name: Bryant
Father's birthplace: North Carolina
Mother's birthplace: Tennessee
Occupation: Keeping House
Marital Status: Married
Race: White
Gender: Female
Household Members: Name Age
Bryant Ipock 64 Farmer b. abt 1816 NC Farmer
Rebecca Ipock 52 wife b. abt 1828 TN keeping house
Mary A. Ipock 21 daughter b. abt 1859 TN single
George B. Ipock 18 son b. abt 1862 TN
Joseph B. Ipock 16 son b. abt 1864 TN
Zachariah Ipock 13 son b. abt 1867 TN

1920 United States Federal Census
Name: George B Ipock
Home in 1920: Hazelwood, Webster, Missouri
Age: 58 years
Estimated Birth Year: abt 1862
Birthplace: Tennessee
Relation to Head of House: Head
Spouse's Name: Theodosia C
Father's Birth Place: South Carolina
Mother's Birth Place: Tennessee
Marital Status: Married
Race: White
Sex: Male
Home owned: Own
Able to read: Yes
Able to Write: Yes
Image: 345
Household Members: Name Age
George B Ipock 58 Farmer
Theodosia C Ipock 55 wife b. IL
Fred A Ipock 24 son single b. MO
Carl Ipock 19 son single b. MO
Cyrus Ipock 17 son single b. MO

1910 United States Federal Census
Name: Joseph B Ipock
Age in 1910: 46
Estimated Birth Year: abt 1864
Birthplace: Tennessee
Relation to Head of House: Head
Father's Birth Place: North Carolina
Mother's Birth Place: Tennessee
Spouse's Name: Frona
Home in 1910: Hazelwood, Webster, Missouri
Marital Status: Married
Race: White
Gender: Male
Household Members: Name Age
Joseph B Ipock 46 Farmer
Frona Ipock 37 wife b. abt 1873 MO
Jesse B Ipock 21 son b. abt 1889 MO
Joseph H Ipock 16 son b. abt 1894 MO
John C Ipock 14 son b. abt 1896 MO

1920 United States Federal Census
Name: Joseph B Ipock
Home in 1920: Hazelwood, Webster, Missouri
Age: 55 years
Estimated Birth Year: abt 1865
Birthplace: Tennessee
Relation to Head of House: Head
Spouse's Name: Sophronia C
Father's Birth Place: North Carolina
Mother's Birth Place: Tennessee
Marital Status: Married
Race: White
Sex: Male
Home owned: Own
Able to read: Yes
Able to Write: Yes
Household Members: Name Age
Joseph B Ipock 55 farmer
Sophronia C Ipock 47 Wife
Mary J Ipock 9 daughter b. abt 1911 MO

1910 United States Federal Census
Name: Zachariah Ipock
Age in 1910: 43
Estimated Birth Year: abt 1867
Birthplace: Tennessee
Relation to Head of House: Head
Father's Birth Place: North Carolina
Mother's Birth Place: Tennessee
Spouse's Name: Samantha
Home in 1910: Gasconade, Wright, Missouri
Marital Status: Married
Race: White
Gender: Male
Household Members: Name Age
Zachariah Ipock 43 married at age 20 Farmer
Samantha Ipock 40 wife married at age 20 mother of 7; 6 still living
John P Ipock 19 son single b. MO home farm
Walter H Ipock 16 son single b. MO home farm
Mosie E Ipock 12 son single b. MO
Nellie Ipock 8 daughter single b. MO
Walter M Hutsell 19 son-in-law married less than 1 yr
Lilly Hutsell 18 daughter
Charles W Alford 44 w/m no relation single

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Unproven on-line genealogical information:

M. Bryant Ipock
Born: 15 Mar 1819 North Carolina [also 1817]
Died: 5 Apr 1900 Seymour, Missouri [also 4 May]
Marriage: 10 Oct 1844 in White, Tennessee
Rebecca Robinson
Born: 16 Oct 1828 in White, Tennessee
Died: 10 Jul 1885 [7 Oct 1885]
Children Sex Birth
Louisa Ipock F 1850 in Tennessee
William B Ipock M born: 7 Nov 1853 in Tennessee Died: 8 Jul 1935 Douglas, Missouri
Mary Ann Ipock F 1857 in Tennessee
George Bryant Ipock M born: 8 Jul 1861 in Tennessee Died: 17 Nov 1945
Joseph Blackburn Ipock M Birth: abt 1864 Tennessee Death: 8 Jul 1935 Douglas, Missouri
Zachariah Hancock Ipock M born: 2 Jun 1867 in Tennessee Died: 8 Feb 1934

JR